VIDEO CLIP: PENSTOCK INSTALLATION (7:31)
Following an ambitious schedule of concrete pouring through 1946, concrete work on the dam’s large monoliths slowed in the winter of 1947. Use of wintertime steam curing techniques allowed the continued pouring of concrete on portions of the dam that had smaller surface areas, such as the small west training wall monoliths. Concrete work on the upper sections of the monoliths continued through late 1948.
Meanwhile, the penstocks had been completely embedded in concrete by spring of 1947. Work concentrated on the west training wall and stilling weir, and on construction of concrete monoliths in the area of the dam covered by the second cofferdam. By late summer 1947, almost all monoliths had been brought up to grade, and work began on dismantling the second cofferdam. In March 1948, Dravo Corporation announced its intention to complete a number of tasks in the following months that would require the closing of some of the dam’s sluice gates. These operations included closing eight of the 16 sluice gates of the dam so that work on one half of the stilling weir could be completed. The company also planned to remove portions of the narrow gauge “dinkey” trestle across the spillway.
VIDEO CLIPS (3):
CONSTRUCTION STATUS FEB. 1947 (0:22)
CONSTRUCTION STATUS NOV. 1947 (0:23),
CONSTRUCTION STATUS SEPT. 1948 (0 :08)
Construction on upper sections of the dam was finished in December 1948, thus concluding all permanent work on the structure. The federal government officially accepted the completed dam on December 10, 1948. Dravo then completed demobilization, site cleanup, and removal of the whirler cranes and construction plant in January 1949.
VIDEO CLIP: NEAR COMPLETE DAM NOV. 1948 (0:46)
The total amount of money paid to Dravo Corporation under the Bluestone Dam construction contract was $13,419,935, including an adjustment of $991,662 under the contract’s escalator clause, fees of $477,357 paid to Dravo because of the suspension of construction, and various other fees and charges. By comparison, Dravo’s original January 1942 bid to complete the job was $11,376,000, while the original government estimate of the cost of the contract was $9,749,826. In the end, the government paid Dravo Corporation $2,043,935 more than the company’s original bid for the project. Much of this cost can be attributed to expenses associated with shutting down and resuming construction of the dam at the end of World War II, and to higher material and labor costs associated with the resumption of construction in 1946.
With the alleviation of the World War II-era power shortage, construction of the dam’s hydroelectric powerhouse was cancelled. The dam was thus completed as a flood control structure only, with provisions that would allow for the future addition of a powerhouse for electric power generation. The original Bluestone Dam contract called for installation of crest gates as part of the main construction campaign, although the gates were not actually designed and installed until several years later. Like the sluice gates, the U.S. government purchased the crest gates directly and the Dravo Corporation installed them. However, officials argued during the second construction campaign that the gates were not essential for operating the dam as a flood control structure only. It was also reasoned that the Huntington District should redesign the gates to have a higher allowable unit stress, thus yielding significant financial savings.
Original plans called for the government to complete design modifications and purchase the crest gates in 1949, with installation to logically follow in 1950. However, installation of the crest gates was not actually completed until 1952. This additional expense raised the total construction cost for Bluestone Dam to nearly $30 million.